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Serverless Computing in Azure
Kubernetes Service mit KEDA
Thorsten Hans
@ThorstenHans
Consultant
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Focus: Cloud Native & Infrastructure as Code
Consultant @ Thinktecture AG
[email protected] [email protected]
thinktecture.com thorsten-hans.com
@ThorstenHans
Thorsten Hans
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Talking Points
Scaling in Kubernetes Scaling with KEDA Hands-On
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Kubernetes scaling capabilities
§ Manual scaling
§ Load based scaling
§ Horizontal Pod Autoscaler
§ AKS Cluster Autoscaling
Scaling in Kubernetes
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Manual scaling
Scaling in Kubernetes
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Horizontal Pod Autoscaler (HPA)
Scaling in Kubernetes
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Cluster Auto-Scaler in Azure Kubernetes Service (AKS)
Scaling in Kubernetes
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Talking Points
Scaling in Kubernetes Scaling with KEDA Hands-On
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Kubernetes Event-driven Autoscaling
§ https://keda.sh
§ Cloud Native Computing Foundation sandbox project
§ Vendor Agnostic
§ Contextual Autoscaling
§ Ships with 25 built-in scalers
§ Built-in Azure Functions Support
What is KEDA
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Architecture
KEDA
https://keda.sh/docs/2.0/concepts/
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Messaging System / Database / Cache / …
Architecture Simplified
KEDA
Kubernetes Cluster
KEDA Operator
Kubernetes Pod Kubernetes Pod
Kubernetes Pod
Kubernetes Pod
Kubernetes Pod Kubernetes Pod
Kubernetes Pod Kubernetes Pod Kubernetes Pod
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Flexbile scaling
§ Scale based on actual load
§ Built-in scalers for
§ Databases
§ Messaging engines
§ Telemetry systems
§ Cache engines
§ Unified configuration approach
§ ScaledObject specification
KEDA Scalers
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Talking Points
Scaling in Kubernetes Scaling with KEDA Hands-On
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Async Processing with Azure Functions and KEDA
Demo Architecture
Local Machine
Message Producer
Azure Public Cloud
Azure Storage Account Queue
(aaa-tasks)
Azure Storage Account Queue
(aaa-transformed)
Azure Storage Account Blobs
(processed)
Azure Kubernetes Service
KEDA Operator
Message Transformer
(Azure Functions Container)
Message Dispatcher
(Azure Functions Container)
Horizontal Pod Autoscaler
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Kubernetes Event-driven Autoscaling
- Install KEDA
- Deploy Azure Functions
- Configure Connections to Azure Storage
- Deploy ScaledObjects
- Produce Load to verify scaling
Demo
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KEDA outperforms traditional resource
based scaling in Kubernetes
where fine-granular components have to
scale contextually
Takeaway
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DEMO Source Code is on GitHub
https://github.com/thinktecture/keda-webinar-november-2020